Hey yt users, I am getting some weird exiting happening with the clump finder and Ranger, and I was wondering if anyone else has experienced the issue, or know what I might be doing wrong? I see that it gets to a point where the min and max densities are the same, but I didn't think it would cause the script to crash... Here is what I'm getting: Finding clumps: min: 1.000000e-22, max: 1.000000e-21, step: 10.000000

Wiping out existing children clumps. Joining... Finished joining in 1.06e+00 seconds Investigating 2 children. Finding clumps: min: 1.000000e-21, max: 1.000000e-21, step: 10.000000 Traceback (most recent call last): File "/scratch/01198/earln/run_files/clump_analysis/find_clumps_plot.py", line 69, in <module> amods.level_sets.find_clumps(master_clump, c_min, c_max, step) File "/share/home/00688/tg458377/local/src/yt-hg/yt/analysis_modules/level_sets/clump_handling.py", line 179, in find_clumps find_clumps(clump, min_val*d_clump, max_val, d_clump) File "/share/home/00688/tg458377/local/src/yt-hg/yt/analysis_modules/level_sets/clump_handling.py", line 188, in find_clumps elif (child._isValid()): File "/share/home/00688/tg458377/local/src/yt-hg/yt/analysis_modules/level_sets/clump_handling.py", line 143, in _isValid self.function_value = eval(self.function) File "<string>", line 1, in <module> File "/share/home/00688/tg458377/local/src/yt-hg/yt/data_objects/derived_quantities.py", line 93, in __call__ return self._call_func_unlazy(args, kwargs) File "/share/home/00688/tg458377/local/src/yt-hg/yt/data_objects/derived_quantities.py", line 116, in _call_func_unlazy retval = self.func(self._data_source, *args, **kwargs) File "/share/home/00688/tg458377/local/src/yt-hg/yt/data_objects/derived_quantities.py", line 320, in _IsBound thermal = (data["ThermalEnergy"] * data["CellMass"]).sum() File "/share/home/00688/tg458377/local/src/yt-hg/yt/data_objects/data_containers.py", line 286, in __getitem__ self.get_data(key) File "/share/home/00688/tg458377/local/src/yt-hg/yt/data_objects/data_containers.py", line 2277, in get_data if self._generate_field(field): File "/share/home/00688/tg458377/local/src/yt-hg/yt/data_objects/data_containers.py", line 2347, in _generate_field self[field] = self.pf.field_info[field](self) File "/share/home/00688/tg458377/local/src/yt-hg/yt/data_objects/field_info_container.py", line 309, in __call__ dd = self._function(self, data) File "/share/home/00688/tg458377/local/src/yt-hg/yt/frontends/enzo/fields.py", line 131, in _ThermalEnergy return data["GasEnergy"] File "/share/home/00688/tg458377/local/src/yt-hg/yt/data_objects/data_containers.py", line 286, in __getitem__ self.get_data(key) File "/share/home/00688/tg458377/local/src/yt-hg/yt/data_objects/data_containers.py", line 2277, in get_data if self._generate_field(field): File "/share/home/00688/tg458377/local/src/yt-hg/yt/data_objects/data_containers.py", line 2347, in _generate_field self[field] = self.pf.field_info[field](self) File "/share/home/00688/tg458377/local/src/yt-hg/yt/data_objects/field_info_container.py", line 310, in __call__ dd *= self._convert_function(data) TypeError: unsupported operand type(s) for *=: 'NoneType' and 'float' TACC: Cleaning up after job: 2259004 TACC: Done.

I've also attempted lowering the step size to 5.0, but with the same result. It also seems to be the case that I do not get this behavior when I use function=True parameter, but I kept keeping jobs that would never end, they would just be outputting Getting field Density from 1 the entire time. So I've had to rerun the clump finder a few times, putting in some minimum conditions, and still it'd happen. Any ideas? Thanks! Nick